Laziness is a most repulsive character flaw. It makes servants unprofitable to their masters and will result in every unprofitable servant of God being cast into the outer darkness where there is weeping and gnashing of teeth (Matthew 25:26-30).
Solomon makes this common-sensical observation: “He who has a slack hand becomes poor, but the hand of the diligent makes rich” (Proverbs 10:4).
Far more dangerous than physical inertia is spiritual laziness. The abundant life of Christian growth and an entrance into the everlasting kingdom is promised only to the diligent—“…for this very reason, giving all diligence, add to your faith virtue, to virtue knowledge, to knowledge self-control, to self-control perseverance, to perseverance godliness, to godliness brotherly kindness, and to brotherly kindness love. For if these things are yours and abound, you will be neither barren nor unfruitful in the knowledge of our Lord Jesus Christ. For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins. Therefore, brethren, be even more diligent to make your call and election sure, for if you do these things you will never stumble; for so an entrance will be supplied to you abundantly into the everlasting kingdom of our Lord and Savior Jesus Christ” (2 Peter 1:5-11, emphasis added).
When it comes to your spiritual development and the working out of your own salvation with fear and trembling (Philippians 2:12), are you using slack hands or diligent ones?